Dampers And Damping
Structures with low damping may be susceptible to vibrations that grow to a severe magnitude. This occurs when the exciting frequency of the external force is resonant with the structural natural frequency. Resonance can cause discomfort, fatigue and damage.
For modern structures that are light and slender, damping often becomes an important issue. The steady-state vibrations at resonance are only limited by the damping of the structure. Therefore increased damping is often required.
SOH Wind Engineering and Svend Ole Hansen ApS have applied solutions to vibration problems caused by environmental, human , and machine induced loads. The solutions have been varying from custom made Tuned Mass Dampers (TMD) in size from 20 kg to 1000 kg, viscous dampers, moving the structural frequency away from the problematic load frequency band, and increasing the structural damping by friction in an added concrete medium or rubber mounting. Each project is solved with respect to the specific circumstances involved.